Zhang Wenjie, Zhao Rui, He Yijia, Ding Wenxuan, Liang Zhongcheng, Kong Meimei, Chen Tao
Opt Express. 2021 Jan 18;29(2):797-804. doi: 10.1364/OE.406140.
In this paper, an optofluidic phase modulator based on electrowetting is presented. The modulator consists of an inner and outer chamber. Two immiscible liquids are filled into the chambers, and a transparent sheet is fixed between the liquid-liquid interface to obtain a flat interface. By applying different voltages to the modulator, the flat interface moves up and down leading to the change of optical path length. Consequently, the variation of the optical path in the proposed modulator exploits the ability to alter the optical phase. To prove the concept, a prototype of the phase modulator is fabricated in experiment, and the ability of phase modulation is detected. Our proposed modulator performs optical phase shift up to ∼6.68 π driven with 150 V. Widespread applications of such an optofluidic phase modulator is foreseeable.
本文提出了一种基于电润湿的光流控相位调制器。该调制器由一个内室和一个外室组成。两种互不相溶的液体被填充到室内，并且在液-液界面之间固定有一张透明薄片以获得一个平坦的界面。通过向调制器施加不同的电压，平坦界面上下移动，导致光程长度发生变化。因此，所提出调制器中的光程变化利用了改变光学相位的能力。为了验证这一概念，在实验中制作了相位调制器的原型，并检测了其相位调制能力。我们提出的调制器在150V驱动下可实现高达约6.68π的光学相移。这种光流控相位调制器的广泛应用是可预见的。
